Compare selling channels on the same assumptions
Use matching order values and costs to compare fixed fees, percentage fees and estimated profit across selling channels.
Keep the comparison fair
Use the same item revenue, shipping assumptions and production cost for every channel. Otherwise, a difference in estimated profit may come from different inputs rather than the channel itself. The calculator’s starting rates are illustrations; replace them with the applicable rates.
Compare fixed and percentage charges
Imagine Channel A charges 10% plus 0.20 per order and Channel B charges 6% plus 1. At revenue of 20, A costs 2.20 and B costs 2.20. At revenue of 50, A costs 5.20 and B costs 4. The cheaper option can change with order value.
Compare the example
Invented channel charges: A = 10% + 0.20; B = 6% + 1.00
| Order revenue | Channel A fee | Channel B fee | Lower fee |
|---|---|---|---|
| 10 | 1.20 | 1.60 | A |
| 20 | 2.20 | 2.20 | Equal |
| 50 | 5.20 | 4.00 | B |
| 100 | 10.20 | 7.00 | B |
On a small screen, scroll the table sideways if needed.
Try this in the calculator
Compare one low-value and one higher-value order while holding product costs constant. Enter the actual channel fees before using the result for a business decision.
Try the example ↗Find the break-even order value
Set the two fee expressions equal: 0.10R + 0.20 = 0.06R + 1. Subtracting gives 0.04R = 0.80, so R = 20. This is a simplified break-even point for these invented charges, assuming both percentage fees use the same revenue base.
Look beyond transaction fees
Subscriptions, advertising, refund costs and fulfilment arrangements can matter. A fee comparison does not estimate how many customers a marketplace will bring you. If you allocate a monthly charge per order, choose a realistic order count and avoid treating that estimate as certain.
Test both small and large orders
Compare your typical order and a lower-value order. Record the fee sources and check whether each percentage includes shipping or other charges. Use the result to understand costs, then consider service requirements and audience fit separately.